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US 2008/0290960 A1Published application
Apparatus of impedance matching for bidirectional data line
AssigneeInfineon Technologies Agam Campeon
InventorBan Hok Goh
Life of this patent
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Abstract
An apparatus includes a bidirectional data line to couple to a device and an impedance to provide an impedance matching between the data line and the device. In some embodiments, when a direction of data flow in the data line is away from the device, the impedance is of a first impedance value, and when the direction of the data flow is toward the device, the impedance is of a second impedance value. In one embodiment, the second impedance value is substantially zero.
Claims22
Apparatus, comprising:
- a bidirectional data line to couple to a device;
- and
- an impedance to provide impedance matching between the data line and the device, when a direction of data flow in the data line is away from the device, the impedance is of a first impedance value, and when the direction of the data flow is toward the device, the impedance is of a second impedance value.
Apparatus, comprising:
- a bidirectional data line to couple to a device;
- an impedance to couple in series between the device and the data line;
- and
- a gate circuit to connect in parallel with the impedance, to turn the gate circuit OFF when a direction of data flow in the data line is away from the device so that the data flow passes through the impedance, and to turn the gate circuit ON when the direction of the data flow is toward the device so that the data flow bypasses the impedance.
1 more element
An apparatus, comprising:
- a bidirectional data line to couple between a first device and a second device;
- a first impedance and a second impedance to couple in series with the data line between the first device and the second device, the first impedance and the second impedance being respectively coupled at one end to the first device and the second device;
- and
- a first gate circuit and a second gate circuit to respectively connect in parallel with the first impedance and the second impedance, when the direction of the data flow is from the first device to the second device, to turn the first gate circuit OFF and to turn the second gate circuit ON so that the data flow passes through the first impedance and bypasses the second impedance, and when the direction of the data flow is from the second device to the first device, to turn the first gate circuit ON and to turn the second gate circuit OFF so that the data flow bypasses the first impedance and passes through the second impedance.
1 more element
Dependencies are inferred from the claim text.